I'm with HIDDY, never watched the stuff
But if I were to, it certainly wouldnt be on a plane. I know the EK crews tell me they have more problems with people in F trying to throw the leg than watching lurid videos.
Once on a flight I was on, a drunk Russian couple were going at it, despite the protests of the crew. It wasnt until the Captain came to the door of their suite in F and told them that he and the First Officer were getting sick of watching via the onboard camera...